This is in root for unknown purpose, with only one entry (a TXT record).

gTLD

Entity

Notes

.aero

air-transport industry

.biz

business

This is an open TLD; any person or entity is permitted to register.

.cat

Catalan

This is a TLD for websites in the Catalan language or related to Catalan culture.

.cam

entertainment

This is an open TLD; any person or entity is permitted to register.

.com

commercial

This is an open TLD; any person or entity is permitted to register.

.coop

cooperatives

.edu

educational

The .edu TLD is limited to institutions of learning (mostly U.S.), such as 2 and 4-year colleges and universities.

.gov

U.S. government

The .gov TLD is limited to U.S. government entities and agencies

.info

information

This is an open TLD; any person or entity is permitted to register.

.int

international organizations

The .int TLD is strictly limited to organizations, offices, and programs which are endorsed by a treaty between two or more nations.

.jobs

companies

The .jobs TLD is designed to be added after the names of established companies with jobs to advertise. At this time, owners of a "company.jobs" domain are not permitted to post jobs of third party employers.

Currently, .pro is reserved for licensed doctors, attorneys, and certified public accountants only. A professional seeking to register a .pro domain must provide their registrar with the appropriate credentials.

.travel

travel and travel-agency related sites

There will, during year 2013, be several hundred more similar top-level domains. Many of them will have company or city names.

The special administrative regions of Hong Kong and Macau use separate Internet top-level domains. For the islands under the administration of the Government of the Republic of China (Taiwan), such as Taiwan, Quemoy, Matsu and Penghu, please refer to ".tw" .

.yu was first given to Yugoslavia. In 2003, Yugoslavia became the union of Serbia and Montenegro. Serbia and Montenegro was given .cs, but they never used it. In 2006, the union ended. Now, both Montenegro and Serbia still use .yu.